Video: 15 actually useful Photoshop shortcuts to help speed up your workflow
Photoshop Training Channel on YouTube has published a video detailing 15 useful, relatively unknown Photoshop keyboard shortcuts for power users. Unlike many similar videos, this channel's video digs into actually useful shortcuts that many users are unlikely to know, including how to resize and rotate cloned content using keyboard keys, improving Puppet Warp tool control, and more.
The video is applicable to North American keyboards and includes both Windows and macOS shortcuts. Most tips build upon commonly known tools and shortcuts, offering ways for professionals to reduce the amount of time they spend clicking and sliding. Adobe maintains a large list of Photoshop shortcuts for Windows and Mac users here.